Door control device



Jan. 14, 1958 R. WARDLAW`r- 2,819,528

DOOR CONTROL DEVICE Filed Aug. 16, 1954 2 Sheets-Sheet l Jan. 14, 1958R. wARDLAw 2,819,628

DOOR CONTROL DEVICE Filed Aug. 1e, 1954 2 sheets-Sheet 2 Il IIII IIIHIUI INVENTOR.

fQuse/ Ward/aw v x f BY HTTORNE V5 United States Patent() DOR CNTROLDEVICE Russell Wardlaw, Mill Valleyfalif., assignor to CoolssonCompany,` San Francisco, Calif., a partnership Application August I6;1954, Serial'No; 450525 Claims". (Gl'..74--625) This invention relatesgenerally to rolling doors and more particularly to devices foroperating rolling doors.

KIn the past, rollingl doors have been provided' with power operated:means for closing andl opening the same, but often no provision has beenmade for opening and closing the doors in the event of power failure ormotor trouble. Devices which have madeprovisions for such contingencyhave in gener-al been rather elaboratel and expensive.

In general, itis an object of the present' invention to provide a power`operated door control mechanism which can be operated by hand in theevent of power failure or motor trouble..

A further object of the invention is to providea device of the4 abovecharacter in which power operated means and hand operated4 means areprovided for door control.

A further object: of the invention is to provide a de vice of the abovecharacter in which the motor may be removed without .interfering withthe hand operated means.

Another object of the invention is to provide `a device of the abovecharacter in which the power operated means is. disconnected duringoperation of the hand operated means. t

Additional objects. of the invention will appear from the followingdescription in which the preferred embodiment of the invention has beenset` forth in detail in conjunction with the accompanying drawing.

Referring to the` drawing:

Figure l. is a side elevational view illustra-ting the door controldevice incorporating the present invention.

Figure 2 is. afront elevationalview of the door control device shown in`Figure I.

Figure 3 isa partial side elevational View of my device on the sideopposite that'shown in Figure l.

Figure 4 is a cross-sectional view taken along the line 4--4 ofFigure`l.

In accordance with the present invention, l employ power operated meansassociated with reduction gearing for operating` a rolling door and handoperated means associated with the same reduction gearing for operatingthe same rolling door in the event of power failure, motor trouble andthe like. The `hand operated means is so connected to` the motoroperated means that when the hand oper-ated means is being usedforopening or closing the rolling door, themotor operated means isdisconnected and` cannot be energized.

The embodiment of my door control device shown in the drawing `consistsof an angular support bracket 11 which serves asa mounting for therolling door l2, the power operated mechanism 13 for controlling therolling 2,319,628 Patented Jan. `14, 1958 ICC door, and the hand" chain'mechanism 14 for also controlling the door. The angular brackets 1I aremounted on thewall 1:6 on the opposite sidesof the opening formed bydoorjambs 1`7 and near the lintel level 1S' so that the rolling door can beraised above the lintel level. Mounting can be `accomplished by anysuitable means such as by fastening the bracket' 1l to the wall angles19 by means of bolts 2l. The wall anglecan'be fastened to-the wall plate22 by any suitable means such as light screws or bolts.

The rolling door 12 may be of conventional construction wherein a mainshaft' 24 is suitably journalled in the brackets 11, and a barrely26isiixed` to theshaft 24 and is coaxially aligned with the same. Acurtain 27 formed of interlocking slats fabricated from a suitablematerial such as cold" rolled strip steel isadapted to be Wound upon thebarrel 26 as the maint shaft 21%' is turned in a counterclockwiseldirection as viewed in Figure l. The sides of the curtain Z7 areadapted: to run in curtain guides 28 which may be fastened; to the wallangles i9" by any suitable means such as bolts. The tops of the guidesare Well flared at 23 -t'o' facilitate entry of the curtain; The entirecurtain barrel assembly is covered by a hood 32 whichI can bevfabricated from sheet steel and attached to the brackets by means of"bolts or screws (not shown).

The main shaft 24Ei is adapted to be rotated by either the power'operated' mechanism 13 or the hand chain mechanism 14 as' hereinafterdescribed.

The hand-chain operated mechanism lli consistsV of a hand chain loop3`6which hasl one end looped about and engaging the teeth on the chainsprocket 37'. The chain should be of sufficient length so that it can bereached with easeby aperson standing on the floor near the door. Thesprocket 37 is mounted on and coaxially aligned with respect toa`projecting flange 358 on pinion 39 and is fixed thereto by means of key4l. The pinion 39l is journalled on a shaft 4211 Shaft l2 Vis providedwith a collar 43V which is mounted in the bracket 1l and one end ofreinforcing member fri/l in such a manner as to prevent rotation of theshaft 42. The reinforcing member can be attached to bracket lil by anysuitable means such as welding.

A shaft 47 having a` collar is mounted in the other end ofthereinforcing member i4 and bracket il so as to prevent rotation of theshaft d'1'. A pinion 49 is journalled on shaft 47 and has a projectingflange S1 which isi coaXiallyaligned with chain sprocket 52 and servesto mount the same. The chain sprocket 52 is fixed to the `flange 51 bymeans of key 53 and pin 5d serves to prevent the sprocket 52 and pinionai@ from slipping off ofthe shaft 47'.

Intermediate the pinions- 39 and 49, l have provided spur gear 56 whichis adapted to be moved into meshing engagement with either of thepinions 39 or 49 by means of a Scotch yoke mechanism 5'7". The spur gear56 is journalled on an eccentric shaft 58 which is rotatably mounted inthe bracket 11 and the reinforcingmember 44 whereby upon rotation ofshaft 5'8 spur gear 56 will be moved into engagement with either pinion39 or pinion 49. The other end of the shaft 5S is provided with a cammember 59 which is fixed to shaft lliby suitable means such as key 61.The* cam member 5'9`is provided with a projecting pin 62" which ismounted offn center and which forms a portion of the Scotch yokemechanifsrnS?. The Scotch yoke rnechanismfconsists of afyoke member 63provided with a slot 64 which engages pin 62. The yoke member 63 isfixed to an operating rod 66 by suitable means such as a set screw 67.The operating rod 66 is limited to vertical motion by means of thebrackets 68. The operating rod 66 should be of such a length so that itcan be easily reached by a person standing on the door near the door.Additional means may be provided for fixing the vertical position of therod in any one of two predetermined vertical positions for a purposehereinafter described.

The cam member 59 is provided with a projecting lug 69 which is adaptedto engage the operating member 71 of a normally open microswitch 72 whenthe operating rod 66 is in its lowermost predetermined position for apurpose hereinafter described.

A chain guard 73 is provided for preventing the hand chain 36 fromjumping off of the sprocket wheel 37 and may be attached to the bracket11 by suitable means such as bolts '74. The guard 73 also serves toprevent the pinion 39 and the sprocket wheel 37 from slipping off of theshaft 42.

Additional reduction gearing may -be utilized for driving the main shaft24 `from the sprocket wheel 37, the amount of reduction gearing beingdependent upon the weight of the curtain 27. In this instance I haveprovided a gear 76 which is adapted to mesh with the spur gear 56 andwhich is journalled on a shaft 77 attached to bracket 11 by means of amounting 78. A pinion 79 is coaXially aligned with and -is mounted onthe projecting flange 81 of gear 76 and is fixed thereto by means of key82. Pin 83 serves to prevent gear 76 and pinion 79 from slipping off ofshaft 77. Pinion 79 meshes with a gear 84 which is fixed to main shaft24 by means of key 86.

The power operated mechanism 13 consists of a gearmotor 91. which ismounted upon the bracket 11 by suitable means such as bolts 92. A chainsprocket 93 is keyed to the output shaft 94 of the gearmotor 91 by meansof key 96. Chain sprocket 93 is connected to the chain sprocket S2 bymeans of roller chain 97.

A cam operated limit switch 98 is associated with the gear 84 and ismounted on the hood 32 -for a purpose hereinafter described. Itsoperating shaft 99 is fastened to a gear 101 by means of pin 102 andgear 101 is meshed with gear 84.

Operation of the door control device may be briefly described asfollows: Let it be assumed that the spur gear 56 is in the positionshown in Figure l where it is shown to be in engagement with pinion 39.In this position, the curtain 27 is adapted to -be raised or lowered bymeans of hand chain 36. Assuming that the curtain 27 is in a loweredposition and it is desired to raise the same, the chain 36 is pulled insuch a manner that the sprocket 37 is rotated in a clockwise direction.Rotation of the sprocket 37 in a clockwise direction rotates pinion 39in a clockwise direction which in turn causes spur gear 56 to rotate ina counterclockwise direction. Rotation of the spur gear 56 in acounterclockwise direction causes clockwise rotation of gear 76 andpinion 79. Clockwise rotation of pinion 79 causes counterclockwiserotation of gear 84 which causes the curtain 27 to be rolled upon thebarrel 26. Rotation of the sprocket wheel 37 is continued until thecurtain is raised to the proper height. The curtain 27 can be lowered bypulling the chain 36 in an opposite direction.

It will be noted that when the yoke member 63 is in its uppermostposition, as shown in Figure 3, that the projecting lug 69 is not incontact with the operating member 71 of the normally open microswitch72. The microswitch 72 is connected into the circuit for energizing thegearmotor 91 and hence until the microswitch is closed by operation ofprojecting lug 69, the gearmotor 91 cannot be energized. Thus, when thecam member 59 is in the position shown in Figure 3, the gearmotor cannotbe .,energized.

1f it desired to raise or lower curtain Z7 by power operated means, itis merely necessary to pull the operating rod 66 to its lowermostposition which operation serves to urge the yoke 63 downwardly whichcauses counterclockwise rotation of the cam member 59 and the eccentricshaft 58, as viewed from Figure l, to cause the spur gear 56 to moveinto engagement with pinion 49 and out of engagement with pinion 39. Atthe same time projecting lug 69 is moved towards the operating member 71which is operated to close microswitch 72.

The curtain 27 can now be raised and lowered by energizing the gearmotor91 by means of a suitably located starter (not shown). Assuming that thecurtain is in its lowermost position and it is desired to raise thesame, the gearmotor 91 is energized so it will rotate in a forward orclockwise direction causing the sprocket wheel 52 and the pinion 49 torotate in a clockwise direction. Clockwise rotation of pinion 49 causescounterclockwise rotation of spur gear 56. Counterclockwise rotation ofspur gear 56 causes clockwise rotation of gear 76 and pinion 79 which inturn causes counterclockwise rotation of gear 84. Counterclockwiserotation of gear 84 serves to roll the curtain 27 upon the barrel 26.

Raising and lowering of the curtain 27 is automatically stopped when thecurtain 27 has been raised to its uppermost position or lowered to itslowermost position by limit switch 98 which de-energizes the gearmotor91. The limit switch 98 is provided with a pair of contacts which areconnected into the gearmotor circuit. They are opened by cams (notshown) when the curtain has reached its uppermost position and also whenit has reached its lowermost position. The cams 4are connected tooperating shaft 99 and thus are positioned by movement of the gear 84.

When it is desired to lower the curtain, it is merely necessary toreverse the direction of rotation of the gearmost 91 by means of thestarter (not shown).

Normally, the curtain 27 would be controlled by the power operatedmechanism 13 and the hand chain mechanism 1.4 would be used only foremergency operation. In this manner, it is still possible to operate thecurtain in the event of power failure or motor trouble.

It will be apparent from the foregoing that I have provided a doorcontrol device with power operated means which can be manually operatedin the event power operated means fails.

I claim:

l. In a device for raising and lowering a rolling door of the typewherein the door includes a curtain adapted to be rolled about a mainhorizontal shaft, the device comprising a bracket, a gear trainconsisting of three gears lying in a single plane and mounted on saidbracket, hand operated means associated with the rst of said gears forrotating the first of said gears, motor operated means associated withthe second of said gears for rotating the second of said gears, meansfor moving the third of said gears in said plane and into engagementwith either of said first or second gears, and reduction gearing adaptedto connect said third gear to said main shaft, said reduction gearingbeing in continuous engagement with said third gear.

2. A device as in claim 1 wherein said means `for moving the third gearincludes an eccentric mounting for said third gear.

3. In a device yfor raising and lowering a rolling door of the typewherein the door includes a curtain adapted to be rolled about a mainshaft, the device comprising a bracket, a gear train mounted upon saidbracket, said gear train consisting of a pair of stub shafts mounted onsaid bracket, a first gear journalled on one of said stub shafts, asecond gear journalled on the other of said stub shafts, a third shaftjournalled in said bracket, one portion of said shaft being eccentric tothe remainder of said shaft, a third gear rotatably mounted on theeccentric portion of said third shaft, hand operated means associatedwith the first of said gears :for rotating the first of said gears,motor operated means associated with the second of said gears forrotating the second of said gears, and means for rotating said thirdshaft to move said third gear into engagement with either of said rst orsecond gears, and reduction gearing continuously engaging said thirdgear and adapted to connect said third gear to said main shaft.

4. A device as in claim 3 wherein said means for rotating said thirdsha-ft includes Scotch-yoke means consisting of a cam member xed to saidthird shaft, a pin mounted off center on said cam member, a yokeengaging said pin, and means for vertically reciprocating said yoke.

5. A device as in claim 4 together with means for pre- 6 ventingoperation of said motor operated means when said gear is in engagementwith said first gear, said means comprising a switch adapted to beoperated by said cam member.

References Cited in the le of this patent UNITED STATES PATENTS1,028,532 Boland June 4, 1912 1,441,229 Lacey Jan. 9, 1923 1,649,797Winn Nov. 15, 1927 2,110,231 McCloud Mar. 8, 1938 2,390,117 MichelmanDec. 4, 1945 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTTONPatent Nm 2,819,628 y January i4, 1.958

Russell Werdlaw It is hereby Certified. that error appears in the abovenumbered patent requiring oorreoiion and that the said. Letters Patentshould read as eorreoined below.,

In 'the grani@y linee and l2y end in the heading to the printed specifilcation, linee and, 4, name of assignee3 for "Cooleson Company", eachoccurrence reed m Gookeon Company Signed and Sealed this Qnd day ofApril 1958.,

(SEAL) Attest:

KARL EL AXLTNE ROBERT C. WATSON Attesting Officer Commissioner ofPatents

